For thousands of years, people have used plants to make medicines. They used different parts of the plants —the roots, the leaves, the flowers, and the bark (树皮). Today, doctors have rediscovered more medicinal (药用) values of some plants. Let’s look at some examples.
Foxglove is a common plant. People have used it to make the heart slow down. Recently scientists have developed another drug from it. This new drug helps prevent other heart problems.
In some areas, malaria has been a problem. Scientists have learned that the bark of a South American tree, the cinchona, can be made into a drug to prevent malaria. For a long time, the Chinese have known that a special plant, wormwood, can also fight malaria. Scientists have been working with it to develop new drugs against malaria.
In Germany, some scientists studied garlic (大蒜) for four years. They found that it helps prevent the build-up of plaque (血小板) because too much plaque is bad for health. This very common plant continues to be studied.
As we know, there are about 250,000 kinds of flowering plants in the world. Scientists have only studied little more than one percent of plants for their medicinal value. Maybe medicines for AIDS and cancer will be made from the other 99 percent.
1.What can foxglove be used for?
A．Studying plants.
B．Building up the plaque.
C．Treating AIDS and cancer.
D．Preventing heart problems.
2.What does the underlined word “malaria” in Paragraph 3 refer to (指的是)?
A．A drug. B．A plant.
C．An illness. D．An animal.
3.How many plants are mentioned in the passage?
A．3. B．4. C．5. D．6
4.Which of the following is the best title for the passage?
A．Past and future
B．Plants and medicine
C．Health and illness
D．Scientists and doctors
1.D
2.C
3.B
4.B
【解析】
试题分析：这篇短文主要讲述了一些利用植物防治疾病的知识.
1.根据短文第二段描述可知,毛地黄主要用来防治心脏病,故选D.
2.联系下文the cinchona, can be made into a drug to prevent malaria. 可知这是一种疾病,故选C.
3.根据短文描述,可知主要提到四种植物,毛地黄,金鸡纳,艾草和大蒜.故选B.
4.这篇短文主要讲述了一些草药知识,故选B,植物和医药.
考点：关于草药知识的说明文阅读
点评：本文浅显易懂，层次分明，学生很容易把握文章中心内容。答题中注意带着问题阅读短文，一般就能顺利找出答题依据。对于不能直接找到根据的问题注意联系上下文，根据短文中心总结出正确答案。
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Title: Relationship Between Age and 1.
|
The elements of the survey |
Time: 2008 Place: in the United States Researcher: Arthur Stone and his 2. Targets: 340,000 adults |
|
The 3. of the survey |
Generally people become happier and feel 4. worried after age 50. By the age of 85, people are happier with their life than they were at 18. Adults between the ages of 22 and 25 have the 5. stress. The kids and those in their early 6. feel the happiest. Men and women have similar emotional patterns as they grow older. However, women feel sadder, more 7. and worried than men do. |
|
Conclusion |
Happiness 8.
with age. That’s because people become more thankful for what they
have and control their emotions 9. as they
get older. It also 10. them less time
to think a |
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